A reckoning over the use of social media is coming to the US. At minimum we're going to need to have full ad disclosure and a means to restrict lies.
Democrats are free to pay google to signal boost their own content, and almost certainly will have.
This is only a story if Google denied the same services to Democrats. We would have already heard if this was the case.
At least not if we want to keep a democracy in the US. Democracy depends on honest public debate.
Maybe you missed the stories from David Frum, former GW Bush GOP speechwriter and neocon, in the Atlantic? These are major major articles, critical to American public debate.
From Feb 2016: "How to Build an Autocracy The preconditions are present in the U.S. today. Here’s the playbook Donald Trump could use to set the country down a path toward illiberalism." https://www.theatlantic.com/magazine/archive/2017/03/how-to-...
Atlantic, Oct 2017: "The Autocratic Element Can America recover from the Trump administration?" https://www.theatlantic.com/magazine/archive/2017/10/the-aut...
Also Newsweek, Sept 2017 "TRUMP IS LIKE AN AUTOCRAT FROM GERMANY IN 1933, FORMER BRITISH AMBASSADOR SAYS" http://www.newsweek.com/trump-autocrat-germany-1933-former-b...
For example : Musings about reigning in certain news sources if he doesn't like what they report.
There are other examples. But is the most blatant.